Humidifier for heating units



Nov. 8, 1927.

E. BUEHRER HUMIDIFIER FOR HEATING UNITS Filed June 9, 1926 Patented Nov. 8, 1927.

V 1,648,537 PATENT OFFICE.

EMIL BUEHRER, OF GREEN BAY, WISCONSIN, ASSIG-NOR TO THE GEO. KEESS ('30., OF

' GREEN BAY, WISCONSIN, A CORPORATION OF WISCONSIN.

HUMIDIFIER FOR HEATING UNITS.

Application filed June 9,

This invention relates to a humidifier. It is particularly directed to a humidifier for use with furnaces, latrobes, stoves, or other heating appliances of this type wlnch are applied in dwellings and other buildings.

which the proper amount of water is maintained in this pan without requiring an auxiliary compartment outside of the furnace.

A further object is to provide a humidifier in which the manipulating valve and.

also the automatic control valve are located wholly exteriorly of the furnace, so that heat from the furnace does not make the valve rapidly deteriorate but, instead, permits a continuous and prolonged use of the valve without renewal.

A further object is to provide a novel form of humidifier in which the utmost freedom of access to the valve is afforded, so it may be renewed, adjusted or replaced without opening any portion of the furnace.

A further object is to provide a humidifier in'which the water level may be maintained at any desired height, and in which its height may be regulated from the outside of the furnace by properly adjusting the valve, and to provide a humidifier in which the support for the float is above the water level, so that it is kept free from sediment and deterioration, usually present in these devices, and thus secure a long life for the apparatus. I

A further object is to provide a novel form of humidifier in which a very low level for the water may be easily maintained without any possible chance of overflow from the pan upon the hot parts of the furnace, and to provide an overflow in the valve exteriorly of the furnace so that in case the valve should fail to function, no damage can result.

An embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a fragmentary view of the upper portion of a furnace with parts broken away and parts shown in section.

Figure 2 is a sectional view showing a plan of the hot water pan and valve mechanism.

Figure 3 is an enlarged vertical sectional view artly broken away, showing the coin struction of valve and associated parts.

Referring to the drawings, it will be seat.

1926. Serial No. 114,664.

that a conventional .type for hot air furnace has beenillustrated,as composed of a heating unit 1, and an outer shell 2, which extends upwardly and forms the top of the furnace.

The water pan 3 is seated upon the top of the heating unit of the furnace and may have an irregular outline, as indicated in Figure 2, to secure the requisite conducting surfaces. This water pan is provided with an end piece 1, as shown most clearly in Figure 3, which is equipped with a fitting 5 provided with a stem guide 6. An outwardly extending pipe 7 is screwed into the fitting 5, as indicated, and projects through the removable plate 8, which forms a continuation of the shell 2 of the furnace, such pipe being attached to the plate, as indicated in Figure 3. This plate may be provided with clamps 9,to permit its ready detachment from the shell of the furnace and also to secure the utmost rigidity when it is in place.

The pipe 7 extends through the plate 8 and its-threaded outer end is received by a fitting 10, which is also provided with a stem guide 11. This fitting screws into the body portion of the valve 12, such valve being supplied with water by. means ofthe supply pipe 13, a manually controlled cut off valve 14 being interposed between the pipe 13 and thevalve 12. The valve body is provided with a main recess or chamber 15 into which the pipe 7 opens. This chamber is internally threaded at its inner end and receives the spanner nut 16 which, in turn, clamps a rubber or other yielding gasket 17 in place. This gasket and the nut 16 form in effect a valve seat centrally apertured. A tapered valve 18 cooperates with this seat and is formed integrally with a threaded stem 19. The stem 19 is adjustably screwed into an enlargement 20 formed on the inner end of the float controlled rod or valve rod 21. In effect, therefore, the rods 19 and 21 form an adjustable valve rod. The outer end of the rod 21 is provided with an enlarged externally threaded member 22 which is joined by means of a coupling 23 to a similarly threaded member 24. The member 24 is slotted and receives the short arm 25 of the float lever. This float lever comprises a rod 26 at the outerend of which a float 27 is carried. The

lever 15 pivotally supported by means clearly shown in Figure 3.

of an overhangingbracket*28--securely-bolt- M plyfi -Further, it is to be noted from Figure- 3 that an overflow opening at arpoint higher than the pipe 7 isprovided in the valvechamber 15, and such overflow open as indicated in Figures 1 and 2.

ing communicates with the overflow pipe 31,

In operation, the valve is preferably adj'usted so that the float will maintain a low water level and thu'savoid all possibility fof overflow from the water pan. If, however; through any wear -or detect in thewaive, water should continue to passtne" valve, it will overflow throughthe' pipe3l, "exteriorly otthe furnace, and thus prevent i water tromfallingupon the hot parts of the furnace.

1 It is to "be noted particularly that the :valve may berenewed, replacedyor adjusted =w1thout:open1ng the furnace chamber, as it is enti-relyrlexteriorto suchehamber. Furother, it is tobe noted thatthe float is sup-* ported'gabove thevwater level and, *consequently, no damage to its supports can'occun from the accumulationot sedimentwhich is an even-presentdetrimenttowthe usual type of floats. It will'beseen further, that the entire deu vicermay be lifted out of the furnace, if de-i sired, bydetaching the clamps 9, andremove ingthe plate 8, together with the parts secured thereto.

in considerabledetail; such description is intended as illustrative rather than limiting as the 1nvent1on maybe variously embodied JAlthough the invention-has been described i and as the scope of such: invention is to be 1 determined as claimed.

' I claim: a

1; A 'humidifier. for furnaces having a heating element and an outerPshelh-said in rsthe county i consm.

humidifier comprising a water pan adapted to rest upon the heating element, a supply pipe adapted to pass through the outer shell and openingiinto the 'Watenpan, a float and float, operated lever positioned "within" the water pan, a rod extending from said float leverwthrojughi said supply pipe, a valve carried by said supply pipe and adapted to be located externally of said shell, said valve having a body portion and a movable mem-,

her; said-movable member being operated by said rod-and said body portiorihaving an overflow pipe mountedat a point higher than 'said pipe.

25 A humidifier for a furnace havin'g a heating 'element and an outer shell, said humidifier comprising a water pan adapted to' rest-upon said heatingelement, a supply pipe having a supply valve,-said supply valve being adapted for positioning externally'of said -shell, said supply pipe lea-ding frond said valve through a wall of'saidwater tionedinsaid'pan, a rod connected to the it float lever-and passing through said-'pipe in I to the body portion of saidwalve, said valve having a movable element controlled byi s aid rod -and adjustable"externally ofl the said furnace, said body portion having an overflow opening located ata" point higher than said pipe,and below the top'of: said pan.

Ahumidifiertor a'vfurnaceicomprising a water pan, a horizontallyextending pipe leading through one wall of said Water-"pan and outwardly therefrom all portions of such pipe being located belowithe top of said pan, a rodpassingthrough said pipe, a

valve carried by theouter endof said pipe and having a movable portion connected to #said rodtsaid valve having anoverflow :port

located at a pointbeloW- the topof the water pan, a lever pivotally mounted within said pan:and operatively connected to said rod,

a float within said wpanwaind (having a rod connected to said lever.

In testimony that I claim the foregoing Iwhaverhereunto iset' myhand at Green Bay 0f-1Brown and State'of Wisl EMiL \BUEHRER. 

